I have read the whole thing and listened to all the calls.
There is no case here based on what is published. The only reasonable things left that should be investigated are how they ended up in the commons area behind the houses. And what was the shootee doing out there? Exercise? Fresh air? He was a guest and not a regular of the neighborhood.
the shooter went looking for him? Or was chased there?
There was obviously a physical confrontation and the man can be heard yelling for help before the gunshots. He has grass and on his back and is wet. He was down and on his back!
His previous call seems informative and his call history appears to prove he is a very aware citizen.
Looks like self defense to me. I don’t think they were making love in the grass unless the dead guys name is Help.